[Linux-cluster] slow NFS performance on GFS2

[Olivier Desport]

Le 26/09/2013 18:09, J. Bruce Fields a écrit :
> On Tue, Sep 24, 2013 at 11:29:07AM +0200, Olivier Desport wrote:
>> Hello,
>>
>> I've installed a two nodes GFS2 cluster on Debian 7.
> What kernel is that?
3.2.0-4-amd64
>
> --b.
>
>> The nodes are
>> connected to the datas by iSCSI and multipathing with a 10 Gb/s
>> link. I can write a 1g file with dd at 500 Mbytes/s. I export with
>> NFS (on a 10 Gb/s network) and I only can reach  220 Mbytes/s. I
>> think that it's a little bit far from 500 Mbytes/s...
>>
>> Do you how to tune my settings to increase the speed for NFS ?
>>
>> GFS2 mount :
>> /dev/vg-bigfiles/lv-bigfiles /export/bigfiles gfs2
>> _netdev,nodiratime,noatime 0 0
>>
>> NFS export :
>> /export/bigfiles
>> 172.16.0.0/16(fsid=2,rw,async,no_root_squash,no_subtree_check)
>>
>> mount on NFS clients :
>> nfs-server:/export/bigfiles /data/bigfiles nfs4
>> _netdev,rw,user,nodiratime,noatime,intr 0 0
>>
>> -- 
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>> Linux-cluster at redhat.com
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